basalt rock deformability

basalt rock deformability

Rock Mass Classification for Columnar Jointed Basalt:

2020-12-29 · For columnar jointed basalt, the strength and deformability features are mainly governed by rock-to-rock contacts. The tightness of weak planes plays an important role in the rock classification. Since the rock

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DEFORMABILITY PROPERTIES OF ROCKS AND ROCK

2006-2-21 · stability of concrete dams depends, in part, on the relative deformability of the foundation rock with respect to the concrete. Rock deformability can be instant or time-deferred. Rock mass deformability depends on the deformability of both intact rock and the discontinuities.

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Limits on strength and deformation properties of

1995-1-1 · Corresponding values for a basaltic rock mass that incorporate the weakening effects of scale are deformation modulus, 10–40 GPa; Poisson's ratio, 0.3; tensile strength, −0.1 to −2.5 MPa; uniaxial compressive strength, 10–90 MPa; and cohesion, 0.6–6 MPa.

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Estimates of in situ deformability with an NX borehole

The in-situ deformability of a highly jointed basalt rock mass was determined by two distinctly different methods: one, by the NX-borehole jack method where the displacements of opposing curved platens were related to the applied hydraulic pressures, and; two, by the modified Goodman jack method where the tangential strains on the borehole walls were related to the induced tangential stresses.

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Analysis of displacement and strain data for the

The in situ deformability of a highly jointed basalt rock mass was determined by the NX borehole jack method where the displacements of opposing curved platens were related to the applied hydraulic pressures, as well as by the modified Goodman jack method where the tangential strains on the borehole walls were related to the indiced tangential stresses.

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Mechanical anisotropy of columnar jointed basalts: An

2014-6-10 · An interesting and important result is that the mechanical deformability and strength anisotropic coefficients for the Baihetan's columnar jointed basalt mass are relatively similar for all testing methods employed, including the in situ P wave velocity, point load, and uniaxial compression tests. This result confirms the strong anisotropic effect in these rock masses and facilitates the relevant

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Analysis of displacement and strain data for the

The in-situ deformability of a highly jointed basalt rock mass was determined by two distinctly different methods: one, by the NX-borehole jack method where the displacements of opposing curved platens were related to the applied hydraulic pressures, and; two, by t

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Basalt Rock Formation, Properties, Composition, Uses

2018-4-10 · Basalt Rock. Basalt makes up large parts of the ocean floor. It can form volcanic islands when it is erupted by volcanoes in ocean basins. The rock has also built huge plateaus on land. The dark plains on the Moon, known as maria, and, possibly, the volcanoes on Mars and Venus are made of basalt. Vesicular and Amygdaloidal Textures

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Evaluation of rock mass deformability using empirical

2017-3-1 · Evaluation of rock mass deformability is an important but very challenging task in the analysis and design of underground structures in rock. Although various empirical (correlation) methods have been developed for determining the deformation modulus of rock masses, they come in many forms and are scattered in different sources.

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DEFORMABILITY PROPERTIES OF ROCKS AND ROCK

2019-2-20 · Rock deformability can be instant or time-deferred. Rock mass deformability depends on the deformability of both intact rock and the discontinuities. In this chapter, we will first talk about the deformability of intact rock; isotropic and anisotropic Basalt Gneis s Schist Quart-zite Marbl e

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Estimates of in situ deformability with an NX borehole

The in-situ deformability of a highly jointed basalt rock mass was determined by two distinctly different methods: one, by the NX-borehole jack method where the displacements of opposing curved platens were related to the applied hydraulic pressures, and; two, by the modified Goodman jack method where the tangential strains on the borehole

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(PDF) Comparative Study of Rock Mass Deformation

The weathering condition of Basalt, Breccia and Tuff rock was prediction of rock-mass strength and deformability. This approach enables a rock mass to be considered as a mechanical continuum

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Rock Mass Classification for Columnar Jointed Basalt:

2020-12-29 · Rock mass classification is important in preliminary design of geotechnical engineering projects. Using the columnar jointed basalt at the foundation of Baihetan Hydropower Station as an example, this paper presents a classification scheme of the columnar jointed rock. Unlike many common rock masses, an obvious characteristic of columnar jointed rock is that it is discontinuous in geometry

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Continuum/Discrete Numerical Simulation of

2016-6-26 · Columnar jointed basalt is a discontinuous rock mass system that exhibits strong anisotropy in deformability and strength. Discrete element methods and the new continuum constitutive model (Comba model) are two approaches for numerical simulation of columnar basalt. The mixed continuum/discontinuum methodology, which takes advantage of each

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effect of weathering on strength and modulus of

DEFORMABILITY PROPERTIES OF ROCKS AND ROCK MASSES 1,determining the uniaxial compressive strength and deformability of rock materials,,modulus. More Price. The effects of weathering on the strength and. were used to drill high strength basalt rock under conditions.

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THE DEFORMATION MODULUS OF ROCK MASSES

2011-3-11 · Even in an extensive in situ test program in fairly uniform and good quality rock mass conditions, deformability data may feature a deviation of 25% or as much as 10 GPa for an average in situ modulus of 40 GPa. The tests involving full scale prototype behaviour (tunnel relaxation) give

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(PDF) Experimental Investigations on Basalt Fibre

2018-10-3 · Basalt, an igneous, extrusive rock (volcanic magma which solidifies in open air) [ 5,8 11 ], is generally found near East Asian countries among which Russia has abund ant reserves

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Rock mass properties Rocscience Inc.

2018-9-21 · Rock mass properties In order to use the Hoek-Brown criterion for estimating the strength and deformability of jointed rock masses, three ‘properties’ of the rock mass have to be estimated. Fresh basalt, chert, diabase, gneiss, granite, quartzite R5 Very strong 100 250 4 10 Specimen requires many blows of a geological

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[PDF] Strength and Deformability of Fiber Reinforced

The research object of the paper is cement paste with the particulate reinforcement of basalt fiber. Regardless of fibers’ length at the same fiber cement mix workability and cement consumption equality compressive solidity of the specimens is reduced with increasing fiber content. This is due to the necessity to increase the water-cement ratio to obtain a given workability.

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